Add 15/20 and 45/9
1st number: 15/20, 2nd number: 5 0/9
15/20 + 45/9 is 23/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
15/20 = 15 × 9/20 × 9 = 135/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
45/9 = 45 × 20/9 × 20 = 900/180 - Add the two like fractions:
135/180 + 900/180 = 135 + 900/180 = 1035/180 - 1035/180 simplified gives 23/4
- So, 15/20 + 45/9 = 23/4
In mixed form: 53/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20+45/9 15/20+90/9 15/40+45/9 15/20+45/18 45/20+45/9 15/60+45/9 15/20+45/27 75/20+45/9 15/20+45/63